given a situation (http://teachingphysics.files.wordpress.com/2009/03/spool-21.png" [Broken]) where a string with tension is pulling a spool of mass m from the bottom, what would be the directions of acceleration and friction? note: there's no slip at all.
given: tension equals weight (mg). the spool has rotational inertia I=(1/2)mr^2
(not trying to calculate anything)
The Attempt at a Solution
the spool would wind up, so velocity would be to the right I think. if you make the axis at where it touches the ground, tension is the only force providing torque...so I think angular acceleration would be clockwise, and so linear acceleration would be pointing right, and friction would be towards the left?
I'm not really sure, so any help would be appreciated.
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